.index_box{
    width: 100%;
    height: 722px;
    background: url(../img/首页大图.jpg) no-repeat;
    background-size: cover;
    background-position: 50% 0;
    position: relative;
    overflow: hidden;
}
.center{
    width: 157px;
    height: 56px;
    /* border: 1px solid black; */
    position: absolute;
    top: 45%;
    left: 45%;
    text-align: center;
}
.center p{
    font-size: 15px;
    color: #ffffff;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 700;
}
.center a{
    font-size: 10px;
    color: #ffffff;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 400;
    text-decoration: underline;
}
.center_right{
    width: 511px;
    height: 721px;
    background-color: #ffffff;
    /* display: none; */
    position: absolute;
    right: -511px;
    z-index: 8;
    transition: all 1s;
    position: fixed;
    top: 0;
}
.center_right div{
    width: 471px;
    height: 98px;
    padding: 17px 20px 0 20px;
}
.center_right div input{
    width: 449px;
    height: 18px;
    padding: 1px 2px 1px 0;
    border: none;
    outline: none;
    font-size: 15px;
    font-weight: 700;
}
.center_right div i{
    font-size: 11px;
    line-height: 15px;
    font-weight: 400;
}
.center_right div input::-webkit-input-placeholder{
    font-size: 15px;
    font-weight: 700;
}
.center_right div ul{
    width: 471px;
    height: 57px;
    margin-top: 20px;
}
.center_right div p{
    font-size: 11px;
    line-height: 15px;
    font-weight: bold;
}
.center_right div ul li a{
    font-size: 11px;
    line-height: 15px;
    color: #000;
    font-weight: 700;
}
.even{
    width: 1519px;
    height: 722px;
    background-color: gray;
    opacity: .7;
    z-index: 7;
    display: none;
    position: fixed;
    top: 0;
}
